diff --git a/altair/__init__.py b/altair/__init__.py
index bcbc87492..98ea2e00e 100644
--- a/altair/__init__.py
+++ b/altair/__init__.py
@@ -1,5 +1,5 @@
 # flake8: noqa
-__version__ = "4.2.1"
+__version__ = "4.2.2"
 
 from .vegalite import *
 from . import examples
diff --git a/doc/releases/changes.rst b/doc/releases/changes.rst
index a2598b2b3..087f7016a 100644
--- a/doc/releases/changes.rst
+++ b/doc/releases/changes.rst
@@ -3,7 +3,7 @@
 Altair Change Log
 =================
 
-Version 4.2.2 (released XXX YY, 2023)
+Version 4.2.2 (released Jan 27, 2023)
 -------------------------------------
 
 Bug Fixes